Pesquisa | SciELO

Resumo A atividade antioxidante do mel de Tetragonisca angustula (TAH) e seu extrato etanólico (TAEE) foram investigados. Os níveis totais de fenólicos (TPC) e flavonóides (TFC) também foram avaliados. Os resultados para TPC foram 19,91 ± 0,38 e 29,37 ± 1,82 mg GAE g-1 e para TFC 0,20 ± 0,02 e 0,14 ± 0,01 mg QE g-1 de TAH e TAEE, respectivamente. As atividades antioxidantes foram 73,29 ± 0,49% e 93,36 ± 0,27% no ensaio DPPH● e 71,73 ± 4,07% e 97,86 ± 0,35% no ABTS●+ para TAH e TAEE, respectivamente. A atividade redutora total foi determinada pelo método de poder redutor (PR) e íon ferrico (Fe III) e os resultados variaram em PR de 151,7 ± 25,7 e 230,7 ± 25,2 mg GAE L-1, para TAH e TAEE respectivamente e para (Fe III) em EC50 0,284 em TAEE e 0,687 em TAH. A análise química por HPLC-DAD do extrato etanólico (TAEE) revelou a presença de ácido ferúlico como componente majoritário no extrato. A análise de RMN 1H confirmou esta estrutura e mostrou a presença de glicose, ácido cítrico, ácido succínico, prolina e derivados de hidrocarbonetos no TAEE. Além disso, a origem botânica também foi investigada e apresentou característica multifloral, tendo encontrado 19 tipos polínicos com predomínio botânico da família Anacardiaceae, sendo o pólen Tapirira predominante (42,6%) e o Schinus secundário (25,7%). Os resultados mostraram que o mel de T. angustula é uma interessante fonte de compostos fenólicos antioxidantes devido à sua origem floral e pode atuar como protetor da saúde humana quando consumido.

Abstract The antioxidant activity of Tetragonisca angustula honey (TAH) and its ethanolic extract (TAEE) were investigated. The total levels of phenolic (TPC) and flavonoids (TFC) were also evaluated. The results for TPC were 19.91 ± 0.38 and 29.37 ± 1.82 mg GAE g-1 and for TFC 0.20 ± 0.02 and 0.14 ± 0.01 mg QE g-1 of TAH and TAEE, respectively. Antioxidant activities were 73.29 ± 0.49% and 93.36 ± 0.27% in the DPPH● assay and 71.73 ± 4.07% and 97.86 ± 0.35% in ABTS●+ for TAH and TAEE, respectively. The total reducing activity was determined by the method of reducing power (PR) and iron ion (Fe III) and the results varied in PR from 151.7 ± 25.7 and 230.7 ± 25.2 mg GAE L-1, for TAH and TAEE respectively and for (Fe III) in EC50 0.284 in TAEE and 0.687 in TAH. Chemical analysis by HPLC-DAD of the ethanolic extract (TAEE) revealed the presence of ferulic acid as majority phenolic component in the extract. The 1H NMR analysis confirmed this structure and showed the also presence of glucose, citric acid, succinic acid, proline and hydrocarbon derivatives. In addition, the botanical origin was also investigated and showed a multifloral characteristic, having found 19 pollen types with a botanical predominance of the Anacardiaceae family, with Tapirira pollen occurring as predominant (42.6%) and Schinus as secondary (25.7%). The results showed that T. angustula honey is an interesting source of antioxidant phenolic compounds due to its floral origin and can act as a protector of human health when consumed.

https://doi.org/10.1590/1519-6984.253599

Resistance of bmr energy sorghum hybrids to sugarcane borer and fall armyworm
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Souza, C. S. F.

; Souza, B. H. S.

; Parrella, R. A. C.

; Simeone, M. L. F.

; Nascimento, P. T.

; França, J. C. O.

; Lima, P. F.

; Mendes, S. M.

Brazilian Journal of Biology

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2024, Volume 84 elocation e251883

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Resumo O menor teor de lignina em espécies de plantas com potencial energético resulta na maior facilidade de quebra da celulose, disponibilizando glicose para geração de etanol. Porém, maiores teores de lignina representa um fator de resistência ao ataque de insetos. O objetivo deste trabalho foi avaliar como importantes pragas do sorgo energia, Diatraea saccharalis e Spodoptera frugiperda, se comportam quanto à alimentação e desempenho em sorgo bmr-6, um genótipo mutante com menor concentração de lignina. Foram realizados experimentos em laboratório e casa de vegetação, avaliando o desenvolvimento destas pragas nos híbridos de sorgo biomassa bmr 007, 008, TX635 e seus respectivos genótipos isogênicos convencionais (sem o gene bmr). O teor de lignina foi maior nos híbridos não bmr, mas nos parâmetros avaliados nos insetos, houve variação entre os tratamentos, não sendo consistente em apenas um híbrido e nem por ser ou não bmr. A menor sobrevivência de S. frugiperda foi verificada no híbrido BR008 tanto bmr quanto não bmr. As notas de injúria por S. frugiperda no sorgo em casa de vegetação foram altas (>7) em todos os tratamentos. Para D. saccharalis, não houve diferença significativa para a sobrevivência larval em laboratório, mas em casa de vegetação o híbrido BR007 tanto bmr quanto não bmr proporcionaram maior sobrevivência. Diante da necessidade de diversificar a matriz energética e o fato de que não foi comprovada neste estudo maior suscetibilidade dos híbridos bmr a ambas as pragas, estes resultados são promissores para o cultivo desses híbridos de sorgo biomassa para produção de biocombustíveis.

Abstract The lower lignin content in plants species with energy potential results in easier cellulose breakdown, making glucose available for ethanol generation. However, higher lignin levels can increase resistance to insect attack. The objective of this work was to evaluate the susceptibility of a bmr-6 biomass sorghum (a mutant genotype with a lower concentration of lignin) to important pests of energy sorghum, Diatraea saccharalis and Spodoptera frugiperda. Experiments were performed in the laboratory and greenhouse to evaluate the development of these pests on the biomass sorghum bmr hybrids BR007, BR008, and TX635 and their respective conventional near-isogenic genotypes (without the bmr gene). The lignin content was higher in non-bmr hybrids, but the evaluated insect variables varied between treatments, not being consistent in just one hybrid or because it is bmr or not. The lowest survival of S. frugiperda was observed in the BR008 hybrid, both bmr and non-bmr. The S. frugiperda injury scores on plants in the greenhouse were high (>7) in all treatments. For D. saccharalis, there was no difference in larval survival in the laboratory, but in the greenhouse, the BR007 hybrid, both bmr and non-bmr, provided greater survival. Due the need to diversify the energy matrix and the fact that greater susceptibility of the bmr hybrids to either pests was not found in this study, these results hold promise for cultivation of these biomass sorghum hybrids for the production of biofuels.

https://doi.org/10.1590/1519-6984.251883 1 downloads

Capillary Electromigration Techniques Applied to Clinical Chemistry Investigations and Alternative Diagnostic Assays: Possibilities and Perspectives Assays
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Moreira, Olívia B. O.

; Berlande, Bruna M.

; Souza, Jéssica C. Q. de

; Candido, João Marcos B.

; Jaeger, Lauren H.

; Adriano, Luiz Henrique C.

; Brito, Marco Antônio D. A. e

; Nascimento, Maria Patrícia do

; Geraldo, Patrícia A.

; Chellini, Paula R.

; Oliveira, Marcone Augusto L. de

Journal of the Brazilian Chemical Society

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Nov 2023, Volume 34 Nº 11 Páginas 1542 - 1564

Resumo: En | Texto: En | PDF: En

Capillary electromigration techniques can be understood as the ones used to separate neutral compounds, solvated ions and ionized species, considering the differentiated migration among them when an electrical field is applied within a capillary column filled with a background electrolyte. Several existing capillary electrophoresis setups provide the possibility of developing reliable quantitative assays of inorganic ions, organic acids, fatty acids, amino acids, carbohydrates, nucleic acids, proteins, hormones, vitamins, macromolecules, and more. Therefore, given the chemical complexity of bodily fluid matrices, capillary electrophoresis (CE) and its variations present themselves as an advantageous strategy for enhancing traditional clinical diagnostic methods and for the development of new ones. The recent advances in the study of the human metabolome associated with technological improvements towards medical applications make CE a very useful and versatile technique for clinical laboratory assays. Within this context, this review has the purpose of presenting some traditional methods used for exams of blood, urine, saliva, feces, and sweat, and how CE can be implemented as a real alternative to enable faster, automated, and cost-effective analysis with a comprehensive perspective that shall result in better diagnostic possibilities for patients, being a powerful tool for helping physicians on the precision medicine achievements. compounds species electrolyte acids carbohydrates proteins hormones vitamins macromolecules more Therefore matrices (CE context blood urine saliva feces sweat faster automated costeffective cost effective patients achievements

https://doi.org/10.21577/0103-5053.20230096

Long-term oncological and surgical outcomes after Video Endoscopic Inguinal Lymphadenectomy (VEIL) in patients with penile cancer
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Tobias-Machado, Marcos

; Ornellas, Antonio A.

; Hidaka, Alexandre K.

; Medina, Luis G.

; Mattos, Pablo A. L.

; Besio, Ruben S.

; Abreu, Diego

; Castro, Pedro R.

; Nishimoto, Ricardo H.

; Astigueta, Juan

; Dourado, Aurus

; Machado, Roberto D.

; Magnabosco, Wesley J.

; Corona-Montes, Victor

; Villoldo, Gustavo M.

; Zampolli, Hamilton C.

; Taha, Anis

; Auad, Pericles R.

; Faria, Eliney F.

; Arantes, Paulo B. O.

; Tavares, Alessandro

; Nascimento, Francisco S. M. S.

; Brazão Jr., Eder S.

; Rocha, Maurício M.

; Costa, Walter H.

; Panico, Vinicius

; Reis, Leonardo O.

; Almeida-Carrera, Roberto J.

; Silva, Rafael C.

; Zequi, Stênio C.

; Calixto, José R. R.

; Sotelo, Rene

International braz j urol

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Out 2023, Volume 49 Nº 5 Páginas 580 - 589

Resumo: En | Texto: En | PDF: En

ABSTRACT Objective: To report outcomes from the largest multicenter series of penile cancer patients undergoing video endoscopic inguinal lymphadenectomy (VEIL). Materials and Methods: Retrospective multicenter analysis. Authors of 21 centers from the Penile Cancer Collaborative Coalition-Latin America (PeC-LA) were included. All centers performed the procedure following the same previously described standardized technique. Inclusion criteria included penile cancer patients with no palpable lymph nodes and intermediate/high-risk disease and those with non-fixed palpable lymph nodes less than 4 cm in diameter. Categorical variables are shown as percentages and frequencies whereas continuous variables as mean and range. Results: From 2006 to 2020, 210 VEIL procedures were performed in 105 patients. Mean age was 58 (45-68) years old. Mean operative time was 90 minutes (60-120). Mean lymph node yield was 10 nodes (6-16). Complication rate was 15.7%, including severe complications in 1.9% of procedures. Lymphatic and skin complications were noted in 8.6 and 4.8% of patients, respectively. Histopathological analysis revealed lymph node involvement in 26.7% of patients with non-palpable nodes. Inguinal recurrence was observed in 2.8% of patients. 10y- overall survival was 74.2% and 10-y cancer specific survival was 84.8%. CSS for pN0, pN1, pN2 and pN3 were 100%, 82.4%, 72.7% and 9.1%, respectively. Conclusion: VEIL seems to offer appropriate long term oncological control with minimal morbidity. In the absence of non-invasive stratification measures such as dynamic sentinel node biopsy, VEIL emerged as the alternative for the management of non-bulky lymph nodes in penile cancer.

https://doi.org/10.1590/s1677-5538.ibju.2023.0065

Thermal synthesis of NiMn2O4 spinel employing Mn oxide ores as starting material
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Nascimento, R. S.

; Figueira, B. A. M.

; F. Neto, E.

; Rabelo, A. A.

; Fernandez, O. J. C.

; Luz, P. T. S. da

; Costa, M. L. da

Cerâmica

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Abr 2023, Volume 69 Nº 390 Páginas 154 - 160

Resumo: En | Texto: En | PDF: En

Abstract It is described for the first time the synthesis and characterization of NiMn2O4 employing the Mn ores from the Amazon Region as starting material, instead of using commercial reagents as normally occurs in its synthesis process. Initially, an Mn ore was transformed into a single product, the octahedral layer (OL) manganese oxide with Ni2+ ions interlayer (Ni-OL-2), which was used as a matrix to obtain NiMn2O4 by thermal decomposition. The following techniques were used for characterization: X-ray diffraction (XRD), X-ray fluorescence spectroscopy (XRF), infrared spectroscopy (FTIR), thermal analysis (TG-DTA), scanning (SEM) and transmission (TEM) electron microscopies. The results revealed that Mn oxide ore composed of nsutite mineral transformed into a well-ordered crystalline Ni-OL-2 phase, after the hydrothermal and cation exchange process. The thermal decomposition of Ni-OL-2 produced the nickel manganite phase at 850 °C with spherical ball morphology and crystal sizes in the range of 200-300 nm.

https://doi.org/10.1590/0366-69132023693903436

Gastroesophageal tube of the Iguana iguana (Iguanidae): histological description, histochemical and immunohistochemical analysis of 5-HT and SS cells
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Serra-Campos, A. O.

; Abreu-Junior, A. N. G.

; Nascimento, A. A.

; Abidu-Figueiredo, M.

; Lima, M. S. C. S.

; Machado-Santos, C.

Brazilian Journal of Biology

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2023, Volume 83 elocation e242086

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Resumo Os objetivos do trabalho foram descrever a estrutura histológica e histoquímica do tubo gastroesofágico da Iguana iguana e verificar a ocorrência e distribuição de células serotonina (5-HT) e somatostatina (SS) imunorreativas. Fragmentos do trato gastrointestinal (TGI) de cinco iguanas foram submetidos à técnica histológica e imunohistoquímica padrão. As células imunorreativas para 5-HT e SS foram quantificadas usando o STEPanizer. O esôfago apresenta epitélio pseudoestratificado colunar ciliado Alcian blue (AB) positivo, com células caliciformes altamente reativas ao ácido periódico de Schiff (PAS). No esôfago cervical, a densidade numérica de células 5-HT por unidade de área (QA [células 5-HT] / µm2) foi de 4.6x10-2 ± 2.0 e o esôfago celomático apresentou QA = 4.0x10-2 ± 1.0. O epitélio do estômago é colunar simples, PAS e AB positivo. As regiões cranial e média do estômago apresentaram (QA [células 5-HT] / µm2) = 6.18x10-2 ± 3.2 e a região caudal, QA = 0.6x10-2 ± 0.2. As células SS foram observadas apenas no estômago caudal, com densidade numérica (QA [células SS] / µm2) = 1.4x10-2 ± 0.9. Em I. iguana, foi observada variações em termos da distribuição das secreções de muco e padrão de ocorrência das células enteroendócrinas secretoras de serotonina e somatostatina no TGI, o que possivelmente reflete uma resposta adaptativa interespecifica.

Abstract The work aims were to describe the histological and histochemical structure of the gastroesophageal tube of Iguana iguana and verify the occurrence and distribution of immunoreactive serotonin (5-HT) and somatostatin (SS) cells. Fragments of the gastrointestinal tract (GIT) of five iguanas were which underwent standard histological and immunohistochemistry technique. Immunoreactive cells for 5-HT and SS were quantified using the STEPanizer. The oesophagus has ciliated columnar pseudostratified epithelium with staining Alcian blue (AB) + and goblet cells highly reactive to periodic acid Schiff (PAS). In the cervical oesophagus, the numerical density of 5-HT cells per unit area (QA [5-HT cells]/µm2) was 4.6x10-2 ± 2.0 and celomatic oesophagus presented QA = 4.0x10-2 ± 1.0. The epithelium of the stomach is simple columnar, PAS and AB +. The cranial and middle regions of the stomach presented (QA [5-HT cells]/µm2) = 6.18x10-2 ± 3.2 and the caudal region, QA = 0.6x10-2 ± 0.2. The SS cells were only observed in the caudal stomach, with numerical density (QA [SS cells]/µm2) = 1.4x10-2 ± 0.9 In I. iguana, variation was observed in terms of the distribution of mucus secretions and the pattern of occurrence of serotonin and somatostatin-secreting enteroendocrine cells in the TGI, which possibly will result in an interspecific adaptive response.

https://doi.org/10.1590/1519-6984.242086 370 downloads

Healthcare workers exposed to COVID-19 patients present an inflammatory status and Th2/Th17/Th22 immune profile: findings from before vaccine application in Brazil
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AQUINO, RODRIGO CESAR A. DE

; BARROS, BÁRBARA RAFAELA S.

; SILVA, GUILHERME ANTONIO S.

; SOUSA, GEORON F. DE

; SOUZA, EDSON B. DE

; SILVA, DYEGO R.C.

; NASCIMENTO, ARIONE V. DO

; SÁ, IGOR W.A. DE

; LIMA, ELKER L.S. DE

; SILVA, BÁRBARA O.

; LIMA, LUÍSA P.O. DE

; VIEIRA, AMANDA M.

; BARBOSA NETO, ADAUTO G.

; MARCOS, BIANCA F. SÃO

; SILVA, ANNA JÉSSICA D.

; OLIVEIRA, TALITA HELENA ARAÚJO DE

; CARVALHO, BRUNO M.

; MUNIZ, MARIA TEREZA C.

; FREITAS, ANTONIO CARLOS DE

; CAMPELO JÚNIOR, EVÔNIO B.

; MELO, CRISTIANE M.L. DE

Anais da Academia Brasileira de Ciências

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2023, Volume 95 Supl. 1 elocation e20220502

Resumo: En | Texto: En | PDF: En

Abstract Healthcare workers present an increased risk of contagion for the SARS-CoV-2 virus due to their labor exposure. Here, we describe the clinical, laboratory, and immunological characteristics of healthcare workers, before vaccine application, exposed to SARS-CoV-2-infected patients. We collected sociodemographic, clinical, and laboratory information from 50 professionals who worked during the COVID-19 pandemic at the Clinical Hospital of the Northwest in Brazil. The results showed that most workers are women, over 50 years old, and worked as nursing technicians. Approximately 56% of workers were positive for a previous infection by RT-PCR and/or anti-SARS-CoV-2-immunoglobulin tests. Increased levels of hematocrit, neutrophils, NK lymphocytes, and fibrinogen, were found in positive healthcare workers, suggesting a light inflammatory status. The immunological findings showed an increase in IL-17 production and a Th2/Th17/Th22 profile followed by high serology for anti-SARS-CoV-2 IgM and IgG. Those data reveal the importance of studies with healthcare workers to investigate if the continuous exposition to the virus may result in chronic activation of the immune system and/or pulmonary inflammation in this target group.

https://doi.org/10.1590/0001-3765202320220502

Deep sea ecosystem exploration and ‘health check’: sampling strategy and methods applied during the iAtlantic_BR10_Petrobras cruise in the Santos Basin, Southwest Atlantic
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Perez, Jose Angel A.

; Barros Neto, Halésio M.C. de

; Arantes, Renata C.M.

; Gaurisas, Daniela Y.

; Silva, Camila F.

; Alves, Fernanda Maria M.

; Costa, Júlia A.

; Eloi, Paula D.C.

; Fonseca, Thayse S.

; Gavazzoni, Lucas

; Lonskis, Isabella da S.

; Nardi, Ricardo U.

; Nascimento, Pedro O.

; Rodrigues, João Vitor M.

; Santos, Ana Lara F. dos

; Santos, Edson C. dos

; Schroeder, Rafael

; Silva, Luis Carlos da

; Souza, Fernanda dos S.S. de

; Bernardino, Ângelo F.

; Cavalcanti, Guarani H.

; Lindner, Alberto

; Mahiques, Michel M. de

; Millo, Christian

; Reis, Priscila

; Sweetman, Andrew K.

; Roberts, J. Murray

Ocean and Coastal Research

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2023, Volume 71 elocation e23046

Resumo: En | Texto: En | PDF: En

Abstract The iAtlantic Project has established an international collaborative strategy to improve mapping and characterization of deep and open ocean ecosystems in understudied regions of the Atlantic and evaluate their health. In December 2022, the first iAtlantic expedition in the South Atlantic set off to map and explore seafloor ecosystems in the Santos Basin slope (200-1,000 m depths) in collaboration with the Petrobras ‘Santos Basin - Regional Characterization Project.’ The 17-day ‘iAtlantic_BR10-Petrobras’ cruise was conducted on board the research vessel NPqHOc Vital de Oliveira (Brazilian Navy) and performed (a) water column structure characterization, (b) seafloor morphology mapping, (c) description of benthic habitats and communities by seafloor imagery and biological/ geological sampling, and (d) ex-situ experiments to assess the functioning of sedimentary ecosystems and their responses to climate-related environmental changes. This study describes the rationale behind the iAtlantic_BR10-Petrobras cruise science plan, reports its sampling strategy and methods, and summarizes its collected data and preliminary results.

https://doi.org/10.1590/2675-2824071.23069jaap

Agronomic parameters of sugarcane under planting densities in different cultivation cycles
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Costa, J. E.

; Silva, J. H. B.

; Silva, I. D. N.

; Silva, G. M. L.

; Nascimento, R. R. A.

; Silva, J. S. L.

; Barbosa, J. M. S.

; Cardoso, E. V. B.

; Silva, A. V.

; Nascimento, M. A.

; Santos, J. P. O.

; Martins, A. H. P. C.

; Pereira Neto, F.

; Amorim, P. M. D.

; Silva, B. O. T.

; Almeida, L. J. M.

; Mielezrski, F.

Brazilian Journal of Biology

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2023, Volume 83 elocation e278007

Resumo: En Pt | Texto: En Pt | PDF: En | PDF: Pt

Abstract Low density sugarcane plantation (LDSP) has been implemented by some sugarcane producers in Brazil, aiming to save seeds and operational costs. The study was carried out in the municipality of Areia, Paraíba, Brazil. Five planting densities were used, varying from 5 to 25 m-2 of buds arranged in randomized blocks, with four replications. Data were measured annually over three cultivation cycles (2017 to 2020), during which the field was fertilized with NPK and the harvests were carried out manually without prior burning. The lower planting density presents higher productivity only in the cane plant (101.03 t ha-1) due to the higher plant height (2.37 m) and the higher number of stalks (11 stalks m-2), suggesting that these variables are due to the greater availability of light, water and photosynthate. However, there is a drastic reduction in sugarcane yield for this lower population in the 2nd ratoon by up to 65.62%, which is correlated with number of stalks per meter. We demonstrate the agronomic viability of LDSP in the population of 10 buds m-2 in relation to conventional planting of sugarcane until the 2nd ratoon. Data are important for future studies to present additional considerations for other production factors, such as the effects of mechanized harvesting and the management of nutrients and water, assessing the sustainability of this large-scale planting system.

Resumo O método de plantio de cana-de-açúcar de baixa densidade (LDSP) vem sendo implementado por alguns produtores de cana-de-açúcar no Brasil, visando economia de sementes e custos operacionais. O estudo foi realizado no município de Areia, Paraíba, Brasil. Utilizou-se cinco densidades de plantio, variando de 5 a 25 m-2 de gemas dispostas em blocos casualizados, com quatro repetições. Os dados foram medidos anualmente ao longo de três ciclos de cultivo (2017 a 2020). Menor densidade de plantio mostrou maior produtividade (101,03 t ha-1) devido à maior altura de planta (2,37 m) e ao maior número de hastes (NS) (11 hastes m-2), sugerindo que essas variáveis são devido à maior disponibilidade de luz, água e fotoassimilados. No entanto, houve redução drástica na produtividade da cana-de-açúcar para esta população menor na 2ª soca em 65,62%, estando correlacionado com o número de colmos por metro. Demonstramos a viabilidade agronômica do LDSP em uma população de 10 gemas m-2 em relação ao plantio convencional de cana-de-açúcar até a 2ª soca. Os dados são importantes para que estudos futuros apresentem considerações adicionais sobre outros fatores de produção, como os efeitos da colheita mecanizada e do manejo de nutrientes e água, avaliando a sustentabilidade desse sistema de plantio em larga escala.

https://doi.org/10.1590/1519-6984.278007

10.

Antifungal activity of terpenes isolated from the Brazilian Caatinga: a review Caatinga
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Barros, D. B.

; Nascimento, N. S.

; Sousa, A. P.

; Barros, A. V.

; Borges, Y. W. B.

; Silva, W. M. N.

; Motta, A. B. S.

; Pinto, J. E. L.

; Sampaio, M. G. V.

; Barbosa, M. F. S.

; Fonseca, M. C.

; Silva, L. A.

; Lima, L. O.

; Borges, M. G. S. A.

; Oliveira, M. B. M.

; Correia, M. T. S.

; Castellano, L. R. C.

; Guerra, F. Q. S.

; Silva, M. V.

Brazilian Journal of Biology

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2023, Volume 83 elocation e270966

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Resumo Os terpenóides, também chamados terpenos ou isoprenóides, são uma família de produtos naturais encontrados em todos os organismos vivos. Muitas plantas são produtoras destes metabolitos secundários, que constituem uma grande parte dos óleos essenciais. Uma das características mais importantes é que os compostos são voláteis, têm odor e podem ser utilizados numa variedade de aplicações em diferentes segmentos industriais ou na medicina tradicional. O Brasil tem uma flora rica e diversificada que pode ser utilizada como fonte de pesquisa para a obtenção de novas moléculas. Dentro desta flora, vale a pena mencionar a Caatinga como um bioma exclusivamente brasileiro que possui plantas adaptadas a uma série de condições climáticas e, portanto, um armazém de compostos a serem descritos. As infecções fúngicas são doenças cada vez mais comuns, devido a isso existe uma grande procura de novos agentes com baixa toxicidade e efeitos secundários. Os cientistas devem procurar novas moléculas que exibam atividade antifúngica para o desenvolvimento de novos medicamentos contra as infecções fúngicas. Esta revisão visa analisar dados científicos dos principais estudos publicados que descrevem o uso de terpenóides e as suas aplicações biológicas como antifúngicos. isoprenóides vivos secundários essenciais voláteis tradicional portanto descritos comuns antifúngicos

Abstract Terpenoids, also named terpenes or isoprenoids, are a family of natural products found in all living organisms. Many plants produce terpenoids as secondary metabolites, and these make up a large part of essential oils. One of most important characteristic is that the compounds are volatile, have odor and can be used in a variety of applications in different industrial segments and traditional medicine. Brazil has a rich and diverse flora that can be used as a source of research for obtaining new molecules. Within the Brazilian flora, it is worth mentioning the Caatinga as an exclusively Brazilian biome where plants adapt to a specific series of weather conditions and therefore become a great storehouse of the terpenoid compounds to be described herein. Fungal infections have become increasingly common, and a great demand for new agents with low toxicity and side effects has thus emerged. Scientists must search for new molecules exhibiting antifungal activity to develop new drugs. This review aims to analyze scientific data from the principal published studies describing the use of terpenes and their biological applications as antifungals. Terpenoids isoprenoids organisms metabolites oils volatile medicine herein common emerged drugs antifungals

https://doi.org/10.1590/1519-6984.270966

11.

Guarana propagation strategies: a review strategies
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Nascimento, A. P.

; Costa Neto, P. Q.

; Almeida, L. N.

; Vieira, L. F. S.

; Matos Júnior, W. A.

; Ferreira, C. C.

; Bezerra, C. S.

; Casas, L. L.

; Atroch, A. L.

; Pereira, J. O.

Brazilian Journal of Biology

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2023, Volume 83 elocation e275940

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Resumo O guaranazeiro [Paullinia cupana var. sorbilis (Mart.) Ducke] é uma espécie de grande importância econômica e social no Brasil, pois é o único produtor comercial de guaraná no mundo. O método de propagação vegetativa indicado para a cultura é a estaquia que visa produtividade, tolerância e uniformidade das cultivares clonais, isso porque a reprodução por sementes possui lenta germinação e alta variabilidade genética, o que nas variedades tradicionais é um fator indesejado. Fatores genéticos podem interferir na capacidade de enraizamento da cultura. Estudos buscam alternativas que possam melhorar essa condição e potencializar o sistema produtivo. Uso de reguladores de crescimento, microrganismos promotores do crescimento vegetal, variação de substratos e adubações, tem sido estratégias utilizadas. Ensaios preliminares sobre a taxa de enraizamento caulinar e germinação de sementes com uso de fitormônio exógenos não demonstraram efeitos expressivos em relação à não aplicação desses indutores. O uso de rizobactérias, apresenta-se como atividade promissora em muitas culturas, ainda não foi demonstrado na cultura do guaraná. Por outro lado, a influência de diferentes substratos sobre o enraizamento, já demonstrou resultados significativos em função da taxa de enraizamento. A adubação das plantas matrizes conforme recomendação do sistema de produção para a cultura, comprovadamente é um procedimento eficiente. Constata-se que ainda são escassos estudos voltados à melhoria da propagação do guaranazeiro, demonstrando que novos protocolos precisam ser explorados, ou que os protocolos já utilizados sejam revistos sob outra perspectiva. Paullinia var Mart. Mart (Mart. Ducke Brasil mundo produtividade clonais genética indesejado produtivo vegetal adubações utilizadas indutores rizobactérias apresentase apresenta se culturas lado eficiente Constatase Constata explorados perspectiva (Mart

Abstract Guarana [Paullinia cupana var. sorbilis (Mart.) Ducke] is a species of great economic and social important in Brazil, as it is the only commercial guarana producer in the world. The vegetative propagation method indicated for the culture is stem cuttings, which aims at productivity, tolerance, and uniformity of clonal cultivars, because reproduction by seeds has slow germination and high genetic variability, which in traditional varieties is an undesirable factor. Genetic factors can interfere with the rooting capacity of the crop. Studies seek alternatives that can improve this condition and enhance the production system. Use of growth regulators, microorganisms that promote plant growth, variation of substrates and fertilization, have been strategies used. Preliminary tests on the rate of stem rooting and seed germination with the use of exogenous phytohormone did not demonstrate in relation to the non-application of these inducers. The use of rhizobacteria, which presents itself as a promising activity in many cultures, has not yet been demonstrated in the culture of guarana. On the other hand, the influence of different substrates on rooting has already shown consistent results as a function of rooting rate. Fertilizing the mother plants as recommended by the production system for the crop has proven to be an efficient procedure. There are still few studies aimed at improving the spread of guarana, demonstrating that new protocols need to be explored, or that the protocols already used are reviewed from another perspective. Paullinia var Mart. Mart (Mart. Ducke Brazil world cuttings productivity tolerance cultivars variability factor regulators fertilization nonapplication non application inducers rhizobacteria cultures hand procedure explored perspective (Mart

https://doi.org/10.1590/1519-6984.275940

12.

Equipment for Monitoring Synchronous Generators Condition through External Magnetic Field Waveforms
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Grillo, L. O. S.

; Wengerkievicz, C. A. C.

; Santos, H. F. dos

; Batistela, N. J.

; Kuo-Peng, P.

; Sadowski, N.

; Matsuo, T. K.

; Souza, C. L. de

; Freitas, L. M. de

; Nascimento, R. J.

Journal of Microwaves, Optoelectronics and Electromagnetic Applications

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Dez 2022, Volume 21 Nº 4 Páginas 527 - 548

Resumo: En | Texto: En | PDF: En

Abstract This paper presents an equipment for monitoring synchronous generators condition through characteristics of the time derivative of the external magnetic field. The developed monitoring methodology allows the identification of established or incipient faults, by detecting changes in the magnetic signature of the synchronous generator. In this methodology, the measurement of signals outside the machine gives this equipment a non-invasive characteristic, allowing its monitoring without interfering or disturbing its operation. The developed system includes the specification of magnetic field sensors, signal measurement and processing equipment, as well as software for analysis and monitoring. The validation of the methodology used in this system was carried out through the analysis of experimental data, presenting efficient results in the detection of electrical and mechanical faults in synchronous generators of an experimental test bench and a hydroelectric power plant. As a result, the commercial specification of this equipment was obtained and two units were implemented in a hydroelectric power plant to monitor 305 MVA synchronous generators.

https://doi.org/10.1590/2179-10742022v21i4268102

13.

Benzophenone Derivatives Showed Dual Anti-Inflammatory and Antiproliferative Activities by Inhibiting COX Enzymes and Promote Cyclin E Downregulation
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Folquitto, Laís R. S.

; Souza, Thiago B. de

; Januario, Jaqueline P.

; Nascimento, Isadora M.

; Brandão, Brenda T. V.

; Moreira, Maria E. C.

; Horvath, Renato O.

; Santos, Marcelo H.

; Coelho, Luiz F. L.

; Veloso, Marcia P.

; Soares, Marisi G.

; Carvalho, Diogo T.

; Ionta, Marisa

; Chagas-Paula, Daniela A.

; Dias, Danielle F.

Journal of the Brazilian Chemical Society

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Abr 2022, Volume 33 Nº 4 Páginas 348 - 360

Resumo: En | Texto: En | PDF: En

Considering the promising antitumor effects of compounds with dual anti-inflammatory and antiproliferative activities, thus benzophenones analogs (2-7) were evaluated on in vivo anti-inflammatory assay and molecular docking analysis. Those with the best molecular docking results were in vitro evaluated on cyclooxygenase (COX) enzymes and tested regarding antiproliferative activity. All derivatives displayed in vivo anti-inflammatory activity. Among them, the substances 2’-hydroxy-4’-benzoylphenyl-β-D-glucopyranoside (4), 4-hydroxy-4’-methoxybenzophenone (5) and 4’-(4’’-methoxybenzoyl)phenyl-β-D-glucopyranoside (7) showed the best values of Glide Score in COX-2 docking evaluation and 4 and 5 selectively inhibited COX-2 and COX-1 in vitro enzymatic assay, respectively. Thus, 4 and 5 were tested against breast cancer (MCF-7, MDA MB-231, Hs578T) and non-small-cell-lung cancer (A549) cell lines. The estrogen-positive MCF-7 cell line was more responsive compared to other tested cell lines. They induced cell cycle arrest at G1/S transition in MCF-7 cell line once there was an increase in G0/G1 population with concomitant reduction of S population. The antiproliferative activity of these substances on MCF-7 was associated with their ability to inhibit cyclin E expression, a critical regulator of G1/S transition. Taken together, the data indicate that 4 and 5 have dual anti-inflammatory and antiproliferative activities and support further studies to evaluate their antitumor potential.

https://doi.org/10.21577/0103-5053.20210154

14.

Study for the incorporation of wood ash in soil-cement brick
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Souza, P. C.

; Nascimento, E. S. S.

; Melo, L.

; Oliveira, H. A.

; Almeida, V. G. O.

; Melo, F. M. C.

Cerâmica

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Mar 2022, Volume 68 Nº 385 Páginas 38 - 45

Resumo: En | Texto: En | PDF: En

Abstract This study aimed to produce soil-cement brick with wood ash incorporation coming from the textile industry. The wood ash was a partial substitute for soil and cement in the manufacture of bricks. 7 formulations were made with different proportions of substitution: 10%, 20%, and 30%. It was noticed that the substitution of cement by wood ash in 10% resulted in brick with enhanced properties, showing a 20% increase for compressive strength and a reduction of 44% for mass loss, thus, with higher durability and a reduction of water absorption of 3%, when comparing to the reference brick (soil-cement). It was shown that the reuse of wood ash in the production of soil-cement bricks is a viable and sustainable option, as it is an alternative for the destination of the waste and a reduction in the consumption of Portland cement, which generates a high volume of carbon dioxide (CO2) during its production.

https://doi.org/10.1590/0366-69132022683853052

15.

Doxazosin adsorption in natural, expanded, and organophilized vermiculite-rich clays
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Rosa, M. S. L.

; Silva, R. A. O.

; Sousa, P. A. A. e

; Nascimento, R. T. do

; Knoerzer, T.

; Santos, M. R. M. C.

Cerâmica

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Mar 2022, Volume 68 Nº 385 Páginas 75 - 83

Resumo: En | Texto: En | PDF: En

Abstract Vermiculite clays are adsorbent materials that have good chemical adsorption capacity, which makes them applicable in the removal of drugs from aqueous solutions. Their lamellar structure can be easily expanded and organophilized. To assess the efficacy and environmentally-tolerant capacity of the adsorption method, the organophilized vermiculite clay was compared to both natural and expanded vermiculite clays. To prepare the organophilized clays, a natural clay sample was expanded at 900 °C. The expanded clay was thus treated by immersion in a 1.0 M NaCl solution and organophilized using a cetyltrimethylammonium bromide (CTMA-Br) surfactant, for 24 h at 50 °C. Natural, expanded, and organophilized samples were characterized using the techniques of XRD, FTIR, TG/DSC, and SEM to observe structural changes after expansion and organophilization. These characterizations indicated that there was an increase in the interlamellar space of the expanded and organophilized sample. In addition, a study of the point of zero charge was performed to determine the surface changes of the samples and the amount of doxazosin adsorption in the samples was determined by the time adsorption test. Further, the organophilized sample showed potential adsorption of the drug doxazosin and high performance in relation to the expanded and natural samples.

https://doi.org/10.1590/0366-69132022683853175

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